Doffer-blade.



No. 657,212 Patented Sept. 4,1900.

A. cnuxuus.

DOFFER BLADE. (Application filed Sept. 8, 1899.;

(No Model.) 2 Sheets-Sheet I.

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DUFFERIBLADE.

(Application filed Sept. 8, 1899.) (No Model.) 2 Sheets-Sheet 2.

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STATES 1, FFICE mart DOF FER- BLADE.

SPECIFICATION forming part of Letters Patent No. 657,212, dated September 4, 1900.

Application filed September 8, 1899- T0 at whom it may concern:

Be it known that I, ALLEN CONKLING, a citi-. zen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented certain new and useful Improve ments in Doffer-Blades, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to doffer-blades, and particularly to a blade of that character adapted to cooperate with a clothed roll such, for instance, as is present in mangles or ironing-machines.

The invention has for one object to dispose a pivoted doifer-blade with its stripping edge above the axis of the cooperating roll and at an angle to the horizontal plane of the axis thereof, so that the blade will not cut or injure the covering of the roll.

A further object of the invention is to so mount and weight this doffer-blade that the bearing contact against the clothed roll may be proportionate to the density or tightness of the covering upon the roll in order to remove adhering articles from the roll.

Another object of the invention is to provide a slightly-flexible blade which by gravity or applied pressure will adapt itself to any extended depressions or inequalities which may occur in the extended length of the mangle-roll with which it cooperates.

Other objects and advantages of the invention will hereinafter appear in the following description, and the novel features thereofwill be particularly pointed out in the appended claims.

In the drawings, Figure 1 represents a transverse section through the operative elements of a mangle, showing the doffer-blade applied in position. Fig. 2 is a partial plan thereof. Fig. 3 is a detail vertical section illustrating the application of the blade. Fig. 4 is a bottom view of the blade. Fig. 5 is a detail perspective, and Fig. 6 is a transverse vertical section.

Like letters of reference indicate like parts throughout the several figures of the drawmes.

The letter A designates a doffer blade, which may be constructed of metal in any desired manner-for instance, by rolling-so as to have sufficient flexibility to accommo- Serial No. 729,357. (No model.)

date itself to the general contour of the roll with which it cooperates and is not a perfectly-rigid bar. This doffer may be applied to any class of machinery, but for the purpose of illustration is shown in connection with the clothed rolls and steam-chest of a mangle or ironing-machine. In the present instance the blade A is in contact with a clothing or covering B, carried by the roll 13, and the blade rests upon and is supported by the steam-chest 0, although any other suitable form of support may be provided. Above the roll B there is located a cooperatin g heated rollB and in connection with the steam-chest C a clothed drum 0 is adapted to rotate. The goods or material being ironed after passing between this drum and the heated surface of the steam-chest passes over the guide 0 and between the heated roll D and the roll D, which is provided with a covering D as usual in this classof machinery.

Forthe purpose of preventinginjury to the fabric covering of the roll B the contactpoint A of the blade A is arranged and disposed to bear against said covering B at a point above a horizontal plane through the axis of the roll. The opposite edge or pivoting-angle A of the blade rests in a suitable 8o groove or socket 0*, formed in a portion of the steam-chest 0 below the horizontal plane of the axis of the roll,and the under face of the blade A is provided with lugs A to which any suitable form of weight may be pivoted for exerting the desired amount of pressure upon the blade. These lugs have been shown as located at various intervals along the extended length of the blade, and the weights E are illustrated as pivoted to said lugs by 0 means of hanger-rods E. This method of mounting the blade permits the same to be readily removed without the necessity of dis connecting any pivotal joints and also insures a smooth path for the passage of material 5 over the surface of the blade. The angle of the contact edge A to the horizontal plane through the axis of the roll causes the blade to rest against the roll without any danger of cutting or injuring the covering thereof. The amount of. weight used is determined by the tightness or density of the covering to the roll, and the contact edge may preferably under some conditions slightly indent the surface of the covering to form a ridge or wrinkle in its material just above the point of the blade. This, however, is an advantage, as it assists the blade in stripping from the covering of the roll any articles adhering thereto, as the wrinkle loosens or raises the fringed edge of towels or other articles which are liable to adhere closely to the fabric covering.

It will be observed that the manner of mounting the blade is such that it is free to follow any general depressions in the contour of the roll, such as are liable to occur when one portion of the roll has been used more frequently than another or with'a heavier class of goods. In this connection it should be stated that the roll and d'ofier-blade frequently extend from one hundred to one hundred and twenty inches in length, so that in a roll of such a length portions thereof are liable to become depressed or raised above the remainder of its surface. The blade is made in sections, which may be bolted together, as at A and of material of such flexibility that the contact edge of the blade will by the weight of the blade, assisted, if necessary, by the weights E, conform to the general outline of the clothed roll with which it cooperates. This contact insures the blades stripping from the roll any articles which may adhere thereto through its entire length.

It will be obvious that changes may be made in the details of construction and configuration of the various parts of the dofferblade and its auxiliary parts without departing from the spirit of the invention as defined by the appended claims.

Having described my invention and set forth its merits, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination with a roll, of a dofferblade pivoted below the horizontal plane of the axis thereof and adapted to yieldingly and automatically engage the periphery of said roll above the said horizontal plane and at an angle thereto; substantially as specified.

2. The combination with a roll, of a dofiferblade pivoted below the horizontal plane of the axis thereof and adapted to yieldingly and automatically engage the periphery of said roll above the said horizontal plane and at an angle thereto, and means suspended from said blade for exerting pressure thereon; substantially as specified. I

3. A flexible doffer-blade having a contact edge and a supporting edge and provided with separate lugs upon its under surface; substantially as specified;

4. In a mangle, the combination with a clothed roll, of a doEer-blade pivoted below the horizontal plane of the axis of said roll and engaging the roll at an angle to and above said horizontal plane, and means for exerting pressure upon said'blade; substantially as specified.

5. In a mangle, the combination with a clothed roll, of a pivoted doffer-blade engaging said roll at an angle to and above the horizontal plane of the axis thereof, and a weight pivotally suspended from the under face of said blade; substantially as specified.

6. In a mangle, the combination with a clothed roll, of a doffer-blade engaging said roll at an angle to and above the horizontal plane of the axis thereof, a weight pivotally suspended from the under face of said blade, and a pivoting-angle upon said blade resting on a fixed support; substantially as specified.

7. The combination with a clothed roll, of a flexible pivoted doffer-blade adapted to contact with said roll throughout its length and above the horizontal plane of the axis thereof; substantially as specified.

8. In a mangle, the combination with a clothed roll and a steam-chest and drum, of a flexible doffer-blade having an edge or angle adapted to rest in a groove in said steamchest and provided with a contact edge to engage said clothed roll, lugs extending from the under surface of said blade, and weights pivotally suspended from said lugs; substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

ALLEN CONKLING.

Witnesses:

LESTER A. GREENE, J. W. GRIFFEN. 

